Backlight Module Light Penetration Layer Blue Light Filtering
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Solution Overview
Problem
Current backlight modules using anti-blue light protective films are prone to dirt and damage from user interaction, have high production costs due to large-area coverage, and use non-biodegradable materials, while existing solutions fail to effectively absorb blue light before it reaches the eye or internal device components.
Innovation Solution
A backlight module with a light-penetration layer containing natural anti-blue light substances like lutein and zeaxanthin, applied on a small-area light incident surface of the light guide plate, absorbs blue light and is encapsulated in a light-penetration structure with an adhesive layer, reducing eye damage and production costs, and allowing natural decomposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an anti-blue light protective film is adhered on the display surface to filter blue light, then blue light filtering effect is achieved, but dirt or damage is readily generated on the protective film due to user interaction
Solution Approach 1:
The patent introduces a light-penetration layer as an intermediary component positioned between the light source and the light guide plate. This layer contains anti-blue light substances that filter blue light before it enters the light guide plate, thereby protecting the display surface from requiring a separate protective film that is susceptible to dirt and damage from user interaction.
2Object-affected harmful factors
If an anti-blue light protective film covers a large-area display region to achieve effective blue light filtering, then blue light filtering coverage is improved, but production costs increase
Solution Approach 1:
The patent extracts the blue light filtering function from the large-area display surface and concentrates it into a specific light-penetration layer positioned at the light incident surface of the light guide plate. This approach maintains effective blue light filtering coverage while significantly reducing the area of anti-blue light material required, thereby lowering production costs.
3Object-affected harmful factors
If metal particles are used as anti-blue light material in the protective film, then blue light filtering capability is achieved, but the material cannot be decomposed naturally and does not meet environmental needs
Solution Approach 1:
The patent changes the material parameter of the anti-blue light substance from synthetic metal particles to natural organic compounds (such as carotenoids, lutein, or zeaxanthin) in the light-penetration layer. This substitution maintains the blue light filtering capability while enabling natural decomposition, thereby eliminating environmental pollution concerns associated with non-biodegradable metal particles.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively absorbs blue light, preventing eye damage and reducing production costs by using a smaller-sized light-penetration layer, while ensuring the natural decomposition of materials, thus addressing environmental concerns and minimizing damage from user interaction.
Implementation Method 1
The light-penetration layer is disposed on the light incident surface and adapted to absorb a light in a wavelength range
Data Source
AI summary
A backlight module including a back plate, a light guide plate, a light-penetration layer, and a light source is provided. The light guide plate is disposed on the back plate and has a light incident surface and a light-emitting surface. The light-penetration layer is disposed on the light incident surface and adapted to absorb a light in a wavelength range. The light source is disposed on the back plate and faces the light incident surface, wherein the light source is adapted to provide a light. After the light passes through the light-penetration layer, the light enters the light guide plate from the light incident surface and is emitted from the light-emitting surface. In addition, a display having the backlight module is also provided.